package org.qqcui.designpattern.patterns.facade;

/**
 * 屏幕实现类
 *
 * @author cuiqingqiang
 * @version 1.0
 * @date 2022/4/29 16:18
 **/
public class Screen {

    private static final Screen instance = new Screen();

    public static Screen getInstance() {
        return instance;
    }

    public void up() {
        System.out.println("Screen is up");
    }

    public void down() {
        System.out.println("Screen is down");
    }
}
